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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-2242

21
FAUCET Score

CVE-2026-2242 is an out-of-bounds read vulnerability affecting janet-lang janet up to version 1.40.1, specifically within the janetc_if function in src/core/specials.c. This vulnerability has a CVSS score of 6.1 (Medium), indicating it can be exploited locally with low complexity and privileges, potentially leading to a loss of confidentiality and high impact on availability. While a public exploit has been disclosed, there is no evidence of active exploitation, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.40.1CPE matchmatch criteria
cpe:2.3:a:janet-lang:janet:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

1.9LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.16%
Probability of exploitation in next 30 days
EPSS Percentile
5.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0016 is in the 32nd percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / janet-lang/janet
Product
github.com / janet-lang/janet/commit/c43e06672cd9dacf2122c99f362120a17c34b391
Patch
github.com / janet-lang/janet/issues/1700
ExploitIssue Tracking
github.com / janet-lang/janet/issues/1702
ExploitIssue Tracking
github.com / oneafter/0123/blob/main/ja2/repro
Exploit
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry